SS Balcony Railing

stainless steel may be the best choice for a railing system designed for both indoors and outdoors – especially if your application is away from large bodies of salt water and won't be exposed to extreme conditionsThe word parapet (as mentioned in TypeIA's abswer) describes a wall-like structure that surrounds a balcony or roof. Another related term is Balustrade which refers to a series of pillars or poles supporting a handrail. Other related terms are guard rail and ledge.